Boilee oovx



COATING OR PLASTIC.

, "Cro'ss Referencn 11. 0. Go'omn: 131111.121: 00mm.

'Pate nted Apr. 3, 1883.

I UNITED STATES P TENT OFFICE."

HENRY c. GOODELLpOFATCHISON, KANSAS.

*aoltsa-covsamc.

srncrrrcn'rron forming part or" LettersPatent No. 274,933, dated April3,1883.

Application filed ,April 7, 1882'. Renewed February 24, 1883. (Nomodel.)

To all whom it may concern:

Be it known. that I, HENRY C. GOODELL, of

Atchison, in the county of Atchison and State of Kansas, have invented anew and useful v Improvement in Boiler-Coverings; and I dohereby-declare that the following is a. full,

- clear, and exact description of the same.

.7 My invention relates to the covering of pipes,

boilers, and like structures in which the heat producing or conveyingmedium is held or conveyed; and my object isto provide an economicalcovering which shall at the same time be, an e'fl'ective means forpreventing the escape and consequent loss of heat by surface 1 5radiation or contact with other bodies, and

' shall also be easily applied,

My invention consists, essentially, of-a plastic compound composed oflamp-black with a fibrous or plastic material, or either of them,

mixed therewith, and adapted to be applied and to harden upon thesurface of the pipe, boiler, or other structure from orjnto which .thepassage-of the heat is to be obstructed.

Hereinafter I have fully described my in- 2 5 vention and the best meansknown tome for the practical use and application of it.

In the accompanying drawing the figure shows a section of a boiler withmy improved covering applied to its surface.

' In Letters Patent of the United States reissued on the 30th day ofNovember, 1880, and numbered 9,483, is described a receptacle pro videdwith double walls, with a filling of lampblack to render'the walls,asfar as practicable,

impervious to the passage of caloric. The loose lamp-blac'k-that is tosay, lamp-black in its ordinary condition,unmixed, or with a percentageof fibrous material-is a non-conductor of heatwhen placed between double0 walls; but it is not practicable so to apply the material upon pipeswhich are used to convey steam, hot air, or for like purposes, nor uponthe outside shells of boilers or other heat-gen.

erators. Nor is it practicable to apply the 5 lamp-black mixedwithcement or lime-alone .directly .to the surfaces, by reason of thelack of adhesiveness of the mixture. Further, in order to give the bestresults, certain details 1 of construction are essential orimportant,consisting in applying the coating in two or more layers. These areshown in the accompanyiug drawing, i which is epresen'ted a section ofpart of a boiler-shell coated in accordance with my invention. Incarrying out my invention, when apply- 5 log it to the coating of smoothboilers, pipes, or like surfaces, Icoat said surfaces .with a mixture towhich, when applied, the mixture containing the lamp-black will adhereThis guicklime thirty parts of crushed or 'gronml as es us and enough ofwater to make a thick WThe amount 0 as es us may be in creased undersome circumstances to give sufiicientadhesiveness. Somelam J-black may 6be added to this first coat, if necessary. This coating is applieddirectly to thepipe or other surface, said surface being preferably hotwhen so covered, as the asbestus sticksmore readily to the heatedsurface. For a second coating I takeof well-slakeduicklimefiftyparts,ot've etable coarse fiber thirty parts, and ofcliu'in-' c a wen y par s. These ingredientsm |Twater and bring to aproper temper, and

w1 afterwart add to them of lamp-black from 7 thirty to fifty parts. The1 on y o penetrating lamp-black with water makes it neoessary to firstmix the other ingredients and then to add the-'lamp-black thereto. Thebody of tion of it-is of thissecond composition just de scribed. This,notwithstanding the large proadhesire,will stick to thorough coatln gfirst applied,an'd it maybe put on in any desired thick- 8 nesscorresponding to the degree of heat to be resisted. It is not necessaryto mixt'he asbestns fiber with this second coating, asit will notordinarily be subjected to sufiicient heat to dewas put onas :it maybeapplied, in several layers. This would prevent sagging of the portion ofthe lamp-black, which is not in itself 5 first coat consists of seventyparts well slaked 6o the covering- -tbat is to say, the largest propor-8o 7 stroy the vegetable fiber. Hair might be used,

-on-that is to say, after the first layer of it ing is applied, for afinish I may add a third surface. It will be apparent that in manycoating such as I have described from threelam -black subsequentlyadded. TEo'm I have specified particularly the spreading it all on atonce, like ordinary morcoating, consisting of well-slaked nicklimetwenty parts; fine] ound fiber en par't',"- china-clay fifty par s, tlioronglil'y' mixed with wa er, wi twenty-five to thirty-five parts ofparts, it will be understood that these propor' tions are notnecessarily to be adhered to closely; but there may be variations withinconsiderable limits without material variation .in the r alt. I havespecified what Ieonsider' the bes proportions. On a large oval surface,for example, much greater proportion of lamp-black can be used than on asmall oval cases much greater amount of adhesiveuess will be requiredthan in others, and the coatings may be varied accordingly. Under nocircumstances need'exactness or nicety be used in mixing the parts.

Under-some circumstances the third coating may be omitted where thefirst and second would give sufiicient protection and finish.

Instead .of the lime, 1 may use cement, plas- .ter-of-paris, or anyequivalents of these substances. For the vegetable fiber I may use woodand paper pulp or the fiber of other vegetable substances.

It is better to apply the mixture of asbestus and lime to the surface ofthe iron in small quantities, like patchwork, at first, instead of tar.On very rough boilers this first coating might not be necessary. I havefound that a fourths of an inch to an inch and a quarter gives excellentresults.

In the drawing 1 have represented the iron at a, the first coating at b,and the second coating at c. The wire coating is indicated at d, and theouter or finishing coat at f.

It will be apparent'that these coatings may be applied to steam-boilers,steam and hot-air pipes, or anysimilar pipes or vessels. It is,'in fact,applicable to any situation where the passage of heat is to beprevented, and would serve as a desirable plaster and roof-covering forhouses in hot climates.

I am aware that it has heretofore been pro posed to mix soot, bone-dust,ground charcoal, and carbonaceous matter generally, with oil andargillaceous earth, and also to mix sootashes, rye-flour, hydrauliccement, flaxseedmeal, hair, and water for coverings for steamboilers;and I am aware that asbestus has been mixed with plastic material insuch coverings, andl do not broadly claimlither carbonaceous material orasbestus in such mixtures for the covering of pipes and boilers.

I claim- 1. As a covering for boilers and like surfaces, a mixtureconsisting of the following ingredients, in substantially theproportions specified,viz: lime, fifty parts; vegetable fiber, thirtyparts; china-clay, twenty parts; and ot' lamp-black, from thirty tofifty parts.

2. In a covering of boilers and the like, a layer composed of quicklime,vegetable fiber, china-clay, and lamp-black.'

3. A finishing-coat for boilers and the like, consisting of qnicklime,twenty parts; finelyground vegetable fiber, twenty parts; chinaclay,fifty parts; and of lamp-black,from twenty-five'to thirty-five parts.

4. A covering for boilers and like surfaces, consisting of a layer ofplastic material mixed with asbestus, and an outer coating of plasticmaterial mixed with vegetable fiber and lampblack, in substantially theproportions specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' HENRY C. GQODELL.

Witnesses:

G. E. SCOVILLE, RAY O. CRAWFORD.

